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   <div id="projectname">EquTemper&#160;<span id="projectnumber">1.01</span></div>
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<a href="_e_t_undo_head_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* ========================================================================= */</span>
<a name="l00002"></a>00002 <span class="comment">/* ------------------------------------------------------------------------- */</span><span class="comment"></span>
<a name="l00003"></a>00003 <span class="comment">/*!</span>
<a name="l00004"></a>00004 <span class="comment">  \file         ETUndoHead.cc</span>
<a name="l00005"></a>00005 <span class="comment">  \date         september 2011</span>
<a name="l00006"></a>00006 <span class="comment">  \author       TNick</span>
<a name="l00007"></a>00007 <span class="comment"></span>
<a name="l00008"></a>00008 <span class="comment">  \brief        Contains the implementation for ETUndoHead class</span>
<a name="l00009"></a>00009 <span class="comment"></span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment">  Copyright (c) 2011, Nicu Tofan</span>
<a name="l00012"></a>00012 <span class="comment"> All rights reserved.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> Redistribution and use in source and binary forms, with or without</span>
<a name="l00015"></a>00015 <span class="comment"> modification, are permitted provided that the following conditions are met:</span>
<a name="l00016"></a>00016 <span class="comment"> * Redistributions of source code must retain the above copyright</span>
<a name="l00017"></a>00017 <span class="comment">   notice, this list of conditions and the following disclaimer.</span>
<a name="l00018"></a>00018 <span class="comment"> * Redistributions in binary form must reproduce the above copyright</span>
<a name="l00019"></a>00019 <span class="comment">   notice, this list of conditions and the following disclaimer in the</span>
<a name="l00020"></a>00020 <span class="comment">   documentation and/or other materials provided with the distribution.</span>
<a name="l00021"></a>00021 <span class="comment"> * Neither the name of the copyright holder nor the</span>
<a name="l00022"></a>00022 <span class="comment">   names of its contributors may be used to endorse or promote products</span>
<a name="l00023"></a>00023 <span class="comment">   derived from this software without specific prior written permission.</span>
<a name="l00024"></a>00024 <span class="comment"></span>
<a name="l00025"></a>00025 <span class="comment"> THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS &quot;AS IS&quot; AND</span>
<a name="l00026"></a>00026 <span class="comment"> ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED</span>
<a name="l00027"></a>00027 <span class="comment"> WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE</span>
<a name="l00028"></a>00028 <span class="comment"> DISCLAIMED. IN NO EVENT SHALL NICU TOFAN BE LIABLE FOR ANY</span>
<a name="l00029"></a>00029 <span class="comment"> DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES</span>
<a name="l00030"></a>00030 <span class="comment"> (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;</span>
<a name="l00031"></a>00031 <span class="comment"> LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND</span>
<a name="l00032"></a>00032 <span class="comment"> ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00033"></a>00033 <span class="comment"> (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS</span>
<a name="l00034"></a>00034 <span class="comment"> SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00035"></a>00035 <span class="comment"></span>
<a name="l00036"></a>00036 <span class="comment">*/</span>
<a name="l00037"></a>00037 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00038"></a>00038 <span class="comment">/* ========================================================================= */</span>
<a name="l00039"></a>00039 <span class="comment">//</span>
<a name="l00040"></a>00040 <span class="comment">//</span>
<a name="l00041"></a>00041 <span class="comment">//</span>
<a name="l00042"></a>00042 <span class="comment">//</span>
<a name="l00043"></a>00043 <span class="comment">/*  INCLUDES    ------------------------------------------------------------ */</span>
<a name="l00044"></a>00044 
<a name="l00045"></a>00045 <span class="preprocessor">#include    &lt;<a class="code" href="main_8h.html" title="Contains global definitions for application.">main.h</a>&gt;</span>
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="preprocessor">#include    &lt;<a class="code" href="_e_t_sheet_view_8h.html" title="Contains the definition for ETSheetView class.">sheet/ETSheetView.h</a>&gt;</span>
<a name="l00048"></a>00048 <span class="preprocessor">#include    &lt;<a class="code" href="_e_t_sheet_8h.html" title="Contains the definition for ETSheet class.">sheet/ETSheet.h</a>&gt;</span>
<a name="l00049"></a>00049 <span class="preprocessor">#include    &lt;<a class="code" href="_e_t_undo_elem_8h.html" title="Contains the definition for ETUndoElem class.">sheet/ETUndoElem.h</a>&gt;</span>
<a name="l00050"></a>00050 
<a name="l00051"></a>00051 
<a name="l00052"></a>00052 <span class="preprocessor">#include    &quot;<a class="code" href="_e_t_undo_head_8h.html" title="Contains the definition for ETUndoHead class.">ETUndoHead.h</a>&quot;</span>
<a name="l00053"></a>00053 
<a name="l00054"></a>00054 <span class="comment">/*  INCLUDES    ============================================================ */</span>
<a name="l00055"></a>00055 <span class="comment">//</span>
<a name="l00056"></a>00056 <span class="comment">//</span>
<a name="l00057"></a>00057 <span class="comment">//</span>
<a name="l00058"></a>00058 <span class="comment">//</span>
<a name="l00059"></a>00059 <span class="comment">/*  CLASS    --------------------------------------------------------------- */</span>
<a name="l00060"></a>00060 
<a name="l00061"></a>00061 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00062"></a><a class="code" href="class_e_t_undo_head.html#a5cfa3b0a2aeb69e0feaf4d35e3ca0296">00062</a> <a class="code" href="class_e_t_undo_head.html#a5cfa3b0a2aeb69e0feaf4d35e3ca0296" title="constructor">ETUndoHead::ETUndoHead</a>  (<a class="code" href="class_e_t_sheet.html" title="Class representing logical root for all elements contained in a document (sheet)">ETSheet</a> * sht)
<a name="l00063"></a>00063     : <a class="code" href="class_c_c___h_d_l2_d.html" title="class representing the list header in a linked list system">CC_HDL2D</a> ()
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065     <a class="code" href="class_e_t_undo_head.html#ae62590579ebaa66daf098a13d433b817" title="associated sheet">asc_sheet</a> = sht;
<a name="l00066"></a>00066     <a class="code" href="class_e_t_undo_head.html#a264a451e83a84f9b5dcbd3340ae1b045" title="maximum number of entries to keep; use -1 for infinite">undo_bf_size</a> = 100; <span class="comment">/* a sensible default */</span>
<a name="l00067"></a>00067     <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00068"></a>00068     <a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a> = 0;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070 <span class="comment">/* ========================================================================= */</span>
<a name="l00071"></a>00071 
<a name="l00072"></a>00072 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00073"></a><a class="code" href="class_e_t_undo_head.html#a8f48c9c5afe9d0204825835d76f2f71a">00073</a> <a class="code" href="class_e_t_undo_head.html#a8f48c9c5afe9d0204825835d76f2f71a" title="destructor">ETUndoHead::~ETUndoHead</a> ( <span class="keywordtype">void</span> )
<a name="l00074"></a>00074 {
<a name="l00075"></a>00075     <span class="comment">/* the items are iterated and destroyed by the CC_HDL2D::~CC_HDL2D() */</span>
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077 <span class="comment">/* ========================================================================= */</span>
<a name="l00078"></a>00078 
<a name="l00079"></a>00079 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00080"></a><a class="code" href="class_e_t_undo_head.html#a534f29b142908093bf8bb5dc32d0df1a">00080</a> <span class="keywordtype">void</span>            <a class="code" href="class_e_t_undo_head.html#a534f29b142908093bf8bb5dc32d0df1a" title="add a new undo item to this chain">ETUndoHead::addUndoItem</a>     (<a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a>* new_it)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 
<a name="l00083"></a>00083     <span class="keywordflow">if</span> (<a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a> &gt; 0)
<a name="l00084"></a>00084         {
<a name="l00085"></a>00085             Q_ASSERT_X((<a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>), <span class="stringliteral">&quot;ETUndoHead::performRedo&quot;</span>,
<a name="l00086"></a>00086                        <span class="stringliteral">&quot;To be in a consistent state, since countRedo() &gt; 0, &quot;</span>
<a name="l00087"></a>00087                        <span class="stringliteral">&quot;the crt_ptr must be non-null.&quot;</span>);
<a name="l00088"></a>00088 
<a name="l00089"></a>00089             <a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a> * itr_el = <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>;
<a name="l00090"></a>00090             <span class="keywordflow">if</span> (itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>() != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00091"></a>00091             {
<a name="l00092"></a>00092                 itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>()-&gt;<a class="code" href="class_e_t_undo_elem.html#a9ce2068993480a341c8f612507d5ac08" title="simply breaks the chain before (places NULL in previous member)">breakBefore</a>();
<a name="l00093"></a>00093             }
<a name="l00094"></a>00094             <a class="code" href="class_c_c___h_d_l2_d.html#a7e5da515643c374f40a8de89895c4185" title="set first item">setFirst</a>(itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>());
<a name="l00095"></a>00095             <a class="code" href="class_c_c___h_d_l2_d.html#a21a47644de2fc07de436b3aa4e6e3885" title="set number of items">setCount</a>(<a class="code" href="class_e_t_undo_head.html#a4c10f662f3feb7719332789cce44c98a" title="return the number of Undo actions available from current point">countUndo</a>());
<a name="l00096"></a>00096             <span class="keywordflow">while</span> (itr_el != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00097"></a>00097                 {
<a name="l00098"></a>00098                     <a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a> * tmp = itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a870e61922d1defbca23ba0dcf0b442c9" title="return previous item">prev</a>();
<a name="l00099"></a>00099                     <span class="keyword">delete</span> itr_el;
<a name="l00100"></a>00100                     itr_el = tmp;
<a name="l00101"></a>00101                 }
<a name="l00102"></a>00102             <a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a> = 0;
<a name="l00103"></a>00103         }
<a name="l00104"></a>00104     <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>;
<a name="l00105"></a>00105     <a class="code" href="class_c_c___h_d_l2_d.html#a824d3fa11e390a90f7bdff462e05e008" title="prepend an item (insert as first item)">prepend</a>(new_it);
<a name="l00106"></a>00106 
<a name="l00107"></a>00107 }
<a name="l00108"></a>00108 <span class="comment">/* ========================================================================= */</span>
<a name="l00109"></a>00109 
<a name="l00110"></a>00110 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00111"></a><a class="code" href="class_e_t_undo_head.html#a1ba04c608d344205da60b8c58adde02a">00111</a> <span class="keywordtype">void</span>            <a class="code" href="class_e_t_undo_head.html#a1ba04c608d344205da60b8c58adde02a" title="perform the undo action">ETUndoHead::performUndo</a>     ( <span class="keywordtype">int</span> cnt )
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113     <span class="keywordflow">if</span> (cnt &lt; 1)
<a name="l00114"></a>00114         {
<a name="l00115"></a>00115             qDebug() &lt;&lt; <span class="stringliteral">&quot;Wrong input to ETUndoHead::performUndo: &quot;</span> &lt;&lt; cnt;
<a name="l00116"></a>00116             <span class="keywordflow">return</span>;
<a name="l00117"></a>00117         }
<a name="l00118"></a>00118     <span class="keywordflow">if</span> (<a class="code" href="class_e_t_undo_head.html#a4c10f662f3feb7719332789cce44c98a" title="return the number of Undo actions available from current point">countUndo</a>() &lt; 1)
<a name="l00119"></a>00119         {
<a name="l00120"></a>00120             qDebug() &lt;&lt; <span class="stringliteral">&quot;ETUndoHead::performUndo has nothing in undo&quot;</span>;
<a name="l00121"></a>00121             <span class="keywordflow">return</span>;
<a name="l00122"></a>00122         }
<a name="l00123"></a>00123 
<a name="l00124"></a>00124     <span class="comment">/* get the item to play with */</span>
<a name="l00125"></a>00125     <span class="keywordflow">if</span> (<a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> == <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00126"></a>00126         {
<a name="l00127"></a>00127             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = <a class="code" href="class_e_t_undo_head.html#af622916c849ea25fa0a0612e2def8c80" title="get first item">first</a>();
<a name="l00128"></a>00128         }
<a name="l00129"></a>00129     <span class="keywordflow">else</span>
<a name="l00130"></a>00130         {
<a name="l00131"></a>00131             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>();
<a name="l00132"></a>00132         }
<a name="l00133"></a>00133     Q_ASSERT_X((<a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>), <span class="stringliteral">&quot;performUndo&quot;</span>,
<a name="l00134"></a>00134                <span class="stringliteral">&quot;This should never happen. The crt_ptr is NULL &quot;</span>
<a name="l00135"></a>00135                <span class="stringliteral">&quot;when the counters indicate that it should have something.&quot;</span>);
<a name="l00136"></a>00136     <span class="keywordflow">for</span> (;;)
<a name="l00137"></a>00137         {
<a name="l00138"></a>00138             <a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a> * next_to_work = <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>();
<a name="l00139"></a>00139 
<a name="l00140"></a>00140             <span class="comment">/* perform the action */</span>
<a name="l00141"></a>00141             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>-&gt;<a class="code" href="class_e_t_undo_elem.html#a4a60dcb4ea178ad3238089f1a51cbcc4" title="perform the undo action">performUndo</a>();
<a name="l00142"></a>00142 
<a name="l00143"></a>00143             cnt--;
<a name="l00144"></a>00144             <a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a>++;
<a name="l00145"></a>00145             <span class="keywordflow">if</span> (cnt &lt;= 0)
<a name="l00146"></a>00146                 <span class="keywordflow">break</span>;
<a name="l00147"></a>00147 
<a name="l00148"></a>00148             <span class="keywordflow">if</span> (next_to_work == <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00149"></a>00149                 <span class="keywordflow">break</span>;
<a name="l00150"></a>00150 
<a name="l00151"></a>00151             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = next_to_work;
<a name="l00152"></a>00152 
<a name="l00153"></a>00153         }
<a name="l00154"></a>00154     <span class="comment">/* crt_ptr must point to first item to redo */</span>
<a name="l00155"></a>00155 
<a name="l00156"></a>00156 
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158 <span class="comment">/* ========================================================================= */</span>
<a name="l00159"></a>00159 
<a name="l00160"></a>00160 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00161"></a><a class="code" href="class_e_t_undo_head.html#abf4ef027d767c94dceed09c9f4e43928">00161</a> <span class="keywordtype">void</span>            <a class="code" href="class_e_t_undo_head.html#abf4ef027d767c94dceed09c9f4e43928" title="perform the redo action">ETUndoHead::performRedo</a>     ( <span class="keywordtype">int</span> cnt )
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163     <span class="keywordflow">if</span> (cnt &lt; 1)
<a name="l00164"></a>00164         {
<a name="l00165"></a>00165             qDebug() &lt;&lt; <span class="stringliteral">&quot;Wrong input to ETUndoHead::performRedo: &quot;</span> &lt;&lt; cnt;
<a name="l00166"></a>00166             <span class="keywordflow">return</span>;
<a name="l00167"></a>00167         }
<a name="l00168"></a>00168 
<a name="l00169"></a>00169     <span class="keywordflow">if</span> (<a class="code" href="class_e_t_undo_head.html#a09648edf7967eaf4a43d0bb6359eabd8" title="return the number of Redo actions available from current point">countRedo</a>() &lt; 1)
<a name="l00170"></a>00170         {
<a name="l00171"></a>00171             qDebug() &lt;&lt; <span class="stringliteral">&quot;ETUndoHead::performRedo has nothing in undo&quot;</span>;
<a name="l00172"></a>00172             <span class="keywordflow">return</span>;
<a name="l00173"></a>00173         }
<a name="l00174"></a>00174 
<a name="l00175"></a>00175     Q_ASSERT_X(<a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>, <span class="stringliteral">&quot;ETUndoHead::performRedo&quot;</span>,
<a name="l00176"></a>00176                <span class="stringliteral">&quot;To be in a consistent state, since countRedo() &gt; 0, &quot;</span>
<a name="l00177"></a>00177                <span class="stringliteral">&quot;the crt_ptr must be non-null.&quot;</span>);
<a name="l00178"></a>00178 
<a name="l00179"></a>00179     <span class="keywordflow">do</span>
<a name="l00180"></a>00180         {
<a name="l00181"></a>00181             <span class="comment">/* perform the action */</span>
<a name="l00182"></a>00182             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>-&gt;<a class="code" href="class_e_t_undo_elem.html#a04b1d1fd102fdfba178667193e46ab0f" title="perform the redo action">performRedo</a>();
<a name="l00183"></a>00183 
<a name="l00184"></a>00184             <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> = <a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a>-&gt;<a class="code" href="class_e_t_undo_elem.html#a870e61922d1defbca23ba0dcf0b442c9" title="return previous item">prev</a>();
<a name="l00185"></a>00185 
<a name="l00186"></a>00186             cnt--;
<a name="l00187"></a>00187             <a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a>--;
<a name="l00188"></a>00188             <span class="keywordflow">if</span> (cnt &lt;= 0)
<a name="l00189"></a>00189                 <span class="keywordflow">break</span>;
<a name="l00190"></a>00190 
<a name="l00191"></a>00191         }
<a name="l00192"></a>00192     <span class="keywordflow">while</span> (<a class="code" href="class_e_t_undo_head.html#a8c602a483eab5c38a6e4f1b8a21f803f" title="current pointer">crt_ptr</a> != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>);
<a name="l00193"></a>00193 
<a name="l00194"></a>00194 }
<a name="l00195"></a>00195 <span class="comment">/* ========================================================================= */</span>
<a name="l00196"></a>00196 
<a name="l00197"></a>00197 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00198"></a><a class="code" href="class_e_t_undo_head.html#ab5969f2f6c69586e4e94e514659bc548">00198</a> <span class="keywordtype">void</span>            <a class="code" href="class_e_t_undo_head.html#ab5969f2f6c69586e4e94e514659bc548" title="change the maximum number of entries that may be stored">ETUndoHead::setMaxCount</a>     (<span class="keywordtype">int</span> new_max)
<a name="l00199"></a>00199 
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201     <a class="code" href="class_e_t_undo_head.html#a264a451e83a84f9b5dcbd3340ae1b045" title="maximum number of entries to keep; use -1 for infinite">undo_bf_size</a> = new_max;
<a name="l00202"></a>00202 
<a name="l00203"></a>00203     <span class="comment">/* if there are more items than this number then delete the surplus */</span>
<a name="l00204"></a>00204     <span class="keywordtype">int</span> i_del = <a class="code" href="class_e_t_undo_head.html#a4c10f662f3feb7719332789cce44c98a" title="return the number of Undo actions available from current point">countUndo</a>() - <a class="code" href="class_e_t_undo_head.html#a264a451e83a84f9b5dcbd3340ae1b045" title="maximum number of entries to keep; use -1 for infinite">undo_bf_size</a>;
<a name="l00205"></a>00205 
<a name="l00206"></a>00206     <span class="keywordflow">if</span> (i_del &gt; 0)
<a name="l00207"></a>00207         {
<a name="l00208"></a>00208             <a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a> * itr_el = <a class="code" href="class_e_t_undo_head.html#a9491704c213d14311c82c121689d2969" title="get nth item">item</a>(<a class="code" href="class_e_t_undo_head.html#a264a451e83a84f9b5dcbd3340ae1b045" title="maximum number of entries to keep; use -1 for infinite">undo_bf_size</a>);
<a name="l00209"></a>00209             <span class="keywordflow">if</span> (itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a870e61922d1defbca23ba0dcf0b442c9" title="return previous item">prev</a>() != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00210"></a>00210                 {
<a name="l00211"></a>00211                     itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a870e61922d1defbca23ba0dcf0b442c9" title="return previous item">prev</a>()-&gt;<a class="code" href="class_e_t_undo_elem.html#ade49a5f00f9d8ff54e11925e89f7df41" title="simply breaks the chain after (places NULL in next member)">breakAfter</a>();
<a name="l00212"></a>00212                 }
<a name="l00213"></a>00213             <span class="keywordflow">while</span> (itr_el != <a class="code" href="aclass__ddhc_8cc.html#a070d2ce7b6bb7e5c05602aa8c308d0c4">NULL</a>)
<a name="l00214"></a>00214                 {
<a name="l00215"></a>00215                     <a class="code" href="class_e_t_undo_elem.html" title="class representing the common interface exposed by all sub-items of a ETI_CplxTxt">ETUndoElem</a> * tmp = itr_el-&gt;<a class="code" href="class_e_t_undo_elem.html#a80f0e8d8608fbb2fb2c7c1ceb3839bbe" title="return next item">next</a>();
<a name="l00216"></a>00216                     <span class="keyword">delete</span> itr_el;
<a name="l00217"></a>00217                     itr_el = tmp;
<a name="l00218"></a>00218                 }
<a name="l00219"></a>00219 
<a name="l00220"></a>00220             <a class="code" href="class_c_c___h_d_l2_d.html#a21a47644de2fc07de436b3aa4e6e3885" title="set number of items">setCount</a>(<a class="code" href="class_e_t_undo_head.html#a264a451e83a84f9b5dcbd3340ae1b045" title="maximum number of entries to keep; use -1 for infinite">undo_bf_size</a>);
<a name="l00221"></a>00221         }
<a name="l00222"></a>00222 
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <span class="comment">/* ========================================================================= */</span>
<a name="l00225"></a>00225 
<a name="l00226"></a>00226 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00227"></a><a class="code" href="class_e_t_undo_head.html#a78a633ec76620692d87afb8eead8fecc">00227</a> QString         <a class="code" href="class_e_t_undo_head.html#a78a633ec76620692d87afb8eead8fecc" title="get the informative text for an action">ETUndoHead::infoText</a>        ( <span class="keywordtype">bool</span> in_undo_chain, <span class="keywordtype">int</span> index )
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229     <span class="keywordflow">if</span> (in_undo_chain)
<a name="l00230"></a>00230         {
<a name="l00231"></a>00231             <span class="keywordflow">return</span> <a class="code" href="class_e_t_undo_head.html#a78a633ec76620692d87afb8eead8fecc" title="get the informative text for an action">infoText</a>(<a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a> + index);
<a name="l00232"></a>00232         }
<a name="l00233"></a>00233     <span class="keywordflow">else</span>
<a name="l00234"></a>00234         {
<a name="l00235"></a>00235             <span class="keywordflow">return</span> <a class="code" href="class_e_t_undo_head.html#a78a633ec76620692d87afb8eead8fecc" title="get the informative text for an action">infoText</a>(<a class="code" href="class_e_t_undo_head.html#a5649ac0b409e3ea1001e5dd5c27f486d" title="number of actions that may be redone at this time">redo_count</a> - index - 1);
<a name="l00236"></a>00236         }
<a name="l00237"></a>00237 }
<a name="l00238"></a>00238 <span class="comment">/* ========================================================================= */</span>
<a name="l00239"></a>00239 
<a name="l00240"></a>00240 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00241"></a><a class="code" href="class_e_t_undo_head.html#a3b7f336e301e33adfa130c3576038e97">00241</a> QString         <a class="code" href="class_e_t_undo_head.html#a78a633ec76620692d87afb8eead8fecc" title="get the informative text for an action">ETUndoHead::infoText</a>        ( <span class="keywordtype">int</span> index )
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243     <span class="keywordflow">if</span> ((index &gt;= <a class="code" href="class_c_c___h_d_l2_d.html#a54f56d39d65a96c776c5987dc74be22f" title="get the number of items">count</a>()) || (index &lt; 0))
<a name="l00244"></a>00244         {
<a name="l00245"></a>00245             qDebug() &lt;&lt; <span class="stringliteral">&quot;Wrong input to ETUndoHead::infoText: &quot;</span>
<a name="l00246"></a>00246                      &lt;&lt; index &lt;&lt; <span class="stringliteral">&quot; &gt;= &quot;</span> &lt;&lt; <a class="code" href="class_c_c___h_d_l2_d.html#a54f56d39d65a96c776c5987dc74be22f" title="get the number of items">count</a>();
<a name="l00247"></a>00247             <span class="keywordflow">return</span> QString();
<a name="l00248"></a>00248         }
<a name="l00249"></a>00249 
<a name="l00250"></a>00250     <span class="keywordflow">return</span> <a class="code" href="class_e_t_undo_head.html#a9491704c213d14311c82c121689d2969" title="get nth item">item</a>(index)-&gt;<a class="code" href="class_e_t_undo_elem.html#a993ebb744103e60f278d0eecd2f98562" title="get the text that describes this instance">description</a>();
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252 <span class="comment">/* ========================================================================= */</span>
<a name="l00253"></a>00253 
<a name="l00254"></a>00254 
<a name="l00255"></a>00255 
<a name="l00256"></a>00256 <span class="comment">/*  CLASS    =============================================================== */</span>
<a name="l00257"></a>00257 <span class="comment">//</span>
<a name="l00258"></a>00258 <span class="comment">//</span>
<a name="l00259"></a>00259 <span class="comment">//</span>
<a name="l00260"></a>00260 <span class="comment">//</span>
<a name="l00261"></a>00261 <span class="comment">/* ------------------------------------------------------------------------- */</span>
<a name="l00262"></a>00262 <span class="comment">/* ========================================================================= */</span>
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